Five of the same Blue Fairy Medals are needed to evolve a Medal from 6★ to 7★. Medals require 5 Blue Fairy Medals of the same Tier to evolve.[1]

Blue Fairy Evolve Medals can be obtained from the Gold Ticket Draw, the Silver Ticket Draw, and the Bronze Ticket Draw. The deals can be drawn using Gold Tickets, Silver Tickets, and Bronze Tickets respectively and they can be earned from PVP Mode.[2]